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Game Setup 5x5 tile layout, 7 chips assigned At most one player can independently reach their goal Chip assignment allows for at least one player to get to goal by trading Only one shortest path possible Scoring function favors resource conservation and gives partial credit

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Experimental Setup Masks and GUI changes to control information visibility and actions Single game settings pool shared across both negotiation protocols 4 communication minutes per game, else default to existing assignment Each player anonymously plays each other player once, in both initial roles

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Results - Performance Average benefit for players in IBN/PBN conditions for different number of goal revelations (significant difference in bold) Average benefit for players in IBN/PBN conditions for different player dependencies (significant difference in bold)

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Discussion Adapted platform robust and flexible Humans show unexpected trust in volunteering goals when asked Self-sacrifice observed on the part of independent players Possible cautionary generosity on the part of dependent players

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Future Work Comparing to games with initially complete information Allowing players to reveal goals without being asked Allowing more than one shortest path Removing anonymity and having repeated games between players Building classifiers using the data